70 PROCEEDINGS OF THE AMERICAN ACADEMY. 
chestnut-colored: achene flattened, oblong-obovate, 3 to 4 mm. long, 
bearing on either surface in the upper half near the margin a longitudinal 
ridge, minutely pitted, dark brown in color; tubercle or beak conical, 
about as long as the achene: set# unequal, 6 in number and mostly 
shorter than the achene. — Mexico. State of Michoacan: in swamps 
near Zamora, altitude 1500 m., 24 May, 1901, and 25 July, 1902, 
C. G. Pringle, nos. 9668, 8642 (hb. Gr.). 
The affinity of Rhynchospora Pringle’ is with R. aurea, Vahl., and 
R. aristata, Boeck., but it differs from both these species in the con- 
tracted inflorescence, and in the achenial characters. 
Tradescantia draceenoides. JT. longifolia, Greenm., Proc. Am. 
Acad. xxxiii. 471 (1898), not Small, Bull. Torr. Bot. Cl. xxiv. 233 
(1897). Dichorisandra longifolia, Mart. & Gal. Bull. Acad. Brux. ix. 
378 (reprint p.7). 7. holosericea, var. dracenoides, Clarke in DC. 
Monogr. Phanerog. 302; Hemsley, Biol. Cent.-Am. Bot. iii. 393. 
Tradescantia saxicola, Stems decumbent or ascending, simple or 
branched, 1 to 2 dm. high, commonly rooting at the nodes, glabrous ex- 
cept along a line continuous with the short ciliated sheath opposite the 
leaf-blade, purplish : leaves narrowly lanceolate, 1.5 to 4 cm. long, 4 to 
8 mm. broad, acute, slightly hirtellous-margined, sparingly pubescent 
above, glabrous beneath : inflorescence terminating the stem and branches 
in sessile subumbellate floral-clusters ; pedicels reflexed and, as well as 
_the calyx, hirsute-pubescent: sepals oblong-ovate, 4 to 4.5 mm. long; 
obtuse : petals white, somewhat exceeding the calyx : stamens unequal ; the 
outer cycle shorter, and with glabrous filaments; the inner fully equal- 
ling the petals, with bearded filaments, and with anther-cells separated 
by rather broad connectives: capsule small, smooth and glabrous, 2 to 
3 mm. in length.—Mexico. State of Guerrero: on ledges, Iguala 
Cafion, near Iguala, 14 September, 1900, C. G. Pringle, no. 9270 
(hb. Gr.). 
This species belongs to the section Descantaria, and in general habit 
resembles 7’. angustifolia, Robinson, 7. disgrega, Kunth, and 7. multi- 
flora, Swartz. 
‘Tradescantia Urbinana. Roots tuberiform, fleshy: stems branch- 
ing from the base; branches erect, 2 to 5 dm. high, glabrous: leaves 
lanceolate or lance-attenuate, 5 to 10 em. long, 0.5 to 1.5 cm. broad, 
acute, smooth-margined, glabrous on both surfaces; sheath slightly in- 
flated, 0.5 to 1 em. long: inflorescence terminating the branches in 
compound pedunculate umbels; bracts small, 3 mm. or less in length; 
peduncles and pedicels glabrous and, as well as the calyx, purplish: 
. 
